Two answers and we will name the flow level, show the bottles that carry it, and point to the spare nipples in that level. Nothing here is medical advice; it is the age marking we print on our own packs.
| Level | Code on the nipple | Flow | We mark it for | In our range |
|---|---|---|---|---|
| Level 0 | SS | Extra slow flow | newborns from day one | 10 items |
| Level 1 | S | Slow flow | 1 month and up | 7 items |
| Level 2 | M | Medium flow | 3 months and up | 7 items |
| Level 3 | L | Large flow | 6 months and up | 1 item |
| Level 4 | LL | Fast flow | 9 months and up | 1 item |
Every level fits every bottle we make, so moving up a flow is a nipple swap, not a new bottle. The long version lives in the primer: how flow levels work.
